Method of controlling the flow of fluids in connected conduits and device therefor



April 3, 1928.

J. c. DIEHL METHOD OF CONTROLLING THE mow OF FLUIDS IN CONNECTEDCONDUITS AND DEVICE THEREFOR Filed Jan.4, 1924 Patented Apr. 3, 1928. VI p I v 'I v JOHN C. DIEHL, or ERiE, sesammmi. memos CdiiTitbriiJiirGTiinrLow, or stains iN ediaedesnetsbiiirs 1ND iiiivIoE THEREFOR.

afifinatidii filed January 4, 1924. semi no 684,313. 1

; A biitterfiy valve IOisiiiOunted on ashaft The invention;isyparticularly advanta- 1 extending, across :t h e inaiii conduit and agreens in controlling, the renaveflow of V fluidsthroiigh two conduitsone of which has worm wheel 12 is mount-led on, the shaft; A

a comparatively, small bypass in order that worm 13 operates on thewheel. The worm a measurementof the fluid flowing through is mounted ona shaft, 14 carried by heai 60' the bypass may be used in determining,the ings 15. A worm gear 16"ineshes .with a total flow of fluid and Ihave exemplified worm 17. .The worm 17 is driven from a remy inventionin this relation. v veising electric ,inotorlS. A, battery .19 isFluids; generally have heretofore been arranged todrive the motor 18," aline 20 ex; measured by displacement meters, proportending from themotor aiid including the 65 tional meters and, orifice meters but theseattery 'in its C' ircuitand lines 21 and 22 have been subject ratherpeculiar disadvanlead ng to the other side of the motor also tages. The.displacement meters While aclea-ding Into the motor and being'adapted tocurate are very expensive and often impraor everse'the'motor as one; orthe other ofth e tical for large volumes especially with fluid l'lneSisclose'd with the line 20. 70 at high pressure. Proportional meters areI U-tube has one end. 2 1 connected by more or less inaccurateespecially at low a p p 25 h' e mai n t. "113 h rates of flowdu'e tofrictional and p'roporinlet side-of the entice, The opposite sidetion'al disturbances. The measurement 26 of theU-tube s connected'by apipe 27 orifice meters involves extended calculations with the by asshat" the inlet side ofthe 75 for changes of differential diflerencesofiorificei The twosi'des of'the .U-tube,'therepressure extending across1 the disc) and f ,are sab'j-eeted alltiines tothe preschangesin'gravity and thes'e are disturbed .SU S 0f the Cbhdu'itSi. seal 28 isbyyariati'on's in initial ressa'reaiidtemarranged Hi ouub fi a 29 s,arp'e'rature' and its commercial capacity range r ng a o s d ofth i f pr- 80 has a limited minimum andmaxiinurn ratio.

I ates against a switch lever 30, the clever be In carrying out myinvention I distribute 'g' in F h l gg bl a et secured the now through"the main dnduit'and a byto he u S r n s 2'a d 7 pass and by specialdevices compel a defiang fi de h'f lf t RQ li' 30 nite proportionof thefluid to traverse. the the lever 30. and these terminals [are Con- 85bypass and measure'with a small accurate nected" with the lines 21 a nd22. U H meter the con-trolled fluid flowing throughv Vvlfh the liquidseal exactly level In the the bypass. f In the particular embodiment Uot t -fi vel" Q fi d 1 h n thi is om li hd' by su plying neutral postion between the terminals 32 c 35 eachconduit with calibrated orificesof defind 1th any m le 31" 90 nite relation and maintaining thepressures 3 e iq id 5621/1 t W ICh lever con in both conduits attheinlet and outlet sides tacts one o h r of h terminals a of theorifices respectively equal." Further closes the circuit through themotor starting" details and features of the invention will the' inotor.When the liquid in the side 2 6 40 appear i'rom thespecification'andcl'ajinis." falls thus indicating an-eXcess of pressure 5 The devices ofthe invention and by which lnthe bypass h motor is driven in a dithemethod may be practiced are illustrated rectlon to open the valve 10.'*X Vhen the liqin the accompanying drawings as follows uid in the'side26 rises due to an excess of Fig. 1 shows a sectional view of theappressure in the main line the switch lever paratus. 30 contacts theterminal33 and the motor Fig. 2 shows an alternative construction.rotates to close the valve 10. In this way 7 1 marks the main conduit, 2an orifice disc regardless of frictional or disturbing losses in themain conduit having the orifice 3, 4 in the bypass or conduit up to theorifice the flanges in the main conduit in which the disc valve is sooperated as to neutralize these 0 is secured, 5 a bypass, and 6 theorifice disc disturbances and maintain a fixed relation having anorifice 7 arranged in the bypass in the two lines and consequently adefinite and secured between the flanges 8 in the relation of flow sothat the readings of the usual manner. meter!) may be computed, or may,in the me- A small and accurate meter 9 of any deter itself, compute thetotal flow of fluid. 55 sired type is placed in the bypass. While I haveshown the devices as being controlled by the pressures at the inlet sideof the orifices I do not wish to be limited in the broader aspects of myinvention to such an application, nor do I wish to be limited to a meanswhich operates on the main conduit as controlling the proportionate flowthrough the two conduits.

In Fig. 2 I have shown an alternative form in which the flow through thebypass may be accelerated by a pump at which has an inlet 35 anddischarge 36 forming the bypass. The pump is driven by a belt 37extending to a motor '38 and the motor 38 is controlled through thelines 2122-20 in the same manner as the construction shown in Fig. 1.

What I claim as new is V 1. In a fluid flow controlling device, thecombination of two connected conduits; pressure sensitive meansconnected with saidconduits comprising a U-tube having one end connectedto one conduit and the other to the other conduit; and mechanismcontrolled by pressures registered in the U-tube for maintaining aconstant pressure relation in said conduits. v

2. In a fluid flow controlling device, the combination of two connectedconduits having a single source of fluid supply; a power drivenmechanism controlling the relative flow of fluid through sald condu ts;and

means responsive to relative flow conditionsin said conduits controllingsaid power mechanism tomaintain a definite flow relation between saidconduits.

3. In a fluid flow controlling device, the combination of two connectedconduits havingasingle'source of fluid supply; a valve in one of theconduits; a power mechanism controlling the valve; a relative pressuresen sitive device responding to the pressure conditions. in saidconduits, the response being to pressure conditions in the valve conduitat the discharge side of the valve; and

means controlled by the pressure sensitive device controlling saidmechanism.

4, In a fluid flowrcontrolling device. the combination of two connectedconduits having a single source of fluid supply; an electrically drivenmechanism controlling the relative flow of fluid through said conduits;and means responsive to relative flow condidevice responding to relativepressure conditions in both conduits the response being to pressure.conditions in: the valve conduit at the discharge side of the valve; andmeans controlled by the pressure sensitive device controlling theelectric motor. V v V 6. Ina fluid flow controlling devicefthecombination or a main conduit and a bypass branching from and leading tothe main conduit, said conduit and bypass having constrictions thereinforming orificesof definite relation; pressure sensit ve devicesconnected with said conduit and bypass ad acent to the orifices;mechanism controlled by said pressure sensitive devices maintammgaconstant relative relation between the pressures at corresponding sidesof theorifices; and a meter in the bypass.

7. In affluid flow controlling device,

combination of a main conduit and a bypass branching from and. leadingto the main conduit, said conduit and bypass having constrictionstherein forming orifices of definite relation; a meter in the bypass;power driven mechanism controlling the relative pressure at thecorresponding sides of the orifices to maintain a constantrelationbetween the flows through the conduit and the bypass; andpressure sensitive mechasaid conduits controlling said mechanism.

8. In a fluid flow controlling device, the" msm responsive to pressureconditions 1n combination of two conduits branching from, V

a common source and having constrictions therein forming orices ofdefinite relation, and means automatically responsivefto rela tivepressure changes at corresponding sides of the orifices to maintain anequal pressure and consequent defin itely related flow through theorifices. r

In testimony whereof my hand. 7 V

JOHN C. DIEHL.

I. have hereunto set

